1diff --git a/pyscf/lib/misc.py b/pyscf/lib/misc.py 2index ed43689ff..a8a0d0e20 100644 3--- a/pyscf/lib/misc.py 4+++ b/pyscf/lib/misc.py 5@@ -42,8 +42,6 @@ if h5py.version.version[:4] == '2.2.': 6 sys.stderr.write('h5py-%s is found in your environment. ' 7 'h5py-%s has bug in threading mode.\n' 8 'Async-IO is disabled.\n' % ((h5py.version.version,)*2)) 9-if h5py.version.version[:2] == '3.': 10- h5py.get_config().default_file_mode = 'a' 11 12 c_double_p = ctypes.POINTER(ctypes.c_double) 13 c_int_p = ctypes.POINTER(ctypes.c_int)